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Phase-Field Modeling of Nonlinear Material Behavior

  • Y.-P. PellegriniEmail author
  • C. Denoual
  • L. Truskinovsky
Conference paper
Part of the IUTAM Bookseries book series (IUTAMBOOK, volume 21)

Abstract

Materials that undergo internal transformations are usually described in solid mechanics by multi-well energy functions that account for both elastic and transformational behavior. In order to separate the two effects, physicists use instead phase-field-type theories where conventional linear elastic strain is quadratically coupled to an additional field that describes the evolution of the reference state and solely accounts for nonlinearity. In this paper we propose a systematic method allowing one to split the nonconvex energy into harmonic and nonharmonic parts and to convert a nonconvex mechanical problem into a partially linearized phasefield problem. The main ideas are illustrated using the simplest framework of the Peierls’Nabarro dislocation model.

Keywords

Screw Dislocation Displacement Discontinuity Dislocation Nucleation Slip Region Bulk Term 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.CEA, DAM, DIFArpajonFrance
  2. 2.Laboratoire de Mécanique des SolidesCNRS UMR-7649, École PolytechniquePalaiseau CedexFrance

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